remove r.stream module that are addons, fix r.stream.extract in grass7

Author: Giovanni Manghi

python/plugins/processing/algs/grass/description/r.stream.angle.txt

@@ -4,10 +4,10 @@ Raster (r.*)
 ParameterRaster|elevation|Input map: elevation map|False
 ParameterRaster|accumulation|Input map: accumulation map|True
 ParameterRaster|depression|Input map: map with real depressions|True
-ParameterNumber|threshold|Minimum flow accumulation for streams|1.0|None|0.1
+ParameterNumber|threshold|Minimum flow accumulation for streams|1.0|None|1
 ParameterNumber|mexp|Montgomery exponent for slope|0|None|0
 ParameterNumber|stream_length|Delete stream segments shorter than cells|0|None|0
 ParameterNumber|d8cut|Use SFD above this threshold|0|None|0
 OutputRaster|stream_raster|Unique stream ids (rast)
-OutputVector|stream_vecter|Unique stream ids (vect)
+OutputVector|stream_vector|Unique stream ids (vect)
 OutputRaster|direction|Flow direction